/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraTypes.h
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)([BlueprintType](Programming/UnrealArchitecture/Reference/Structs/Specifiers/BlueprintType), Meta=(DisplayName="Niagara ID")) struct FNiagaraID
int32
AcquireTag
A unique tag for when this ID was acquired.
int32
Index
Indexin the indirection table for this particle.